Dharun Ravi's spying on Tyler Clementi was a prank, not a crime

I’m sorry, but I don’t get it: Why is Dharun Ravi on trial for turning on a webcam while his roommate, Tyler Clementi, was engaged in a physical encounter with another man? Such pranks happen every day in dorms, yet it appears Clementi’s sexual orientation and the fact that he later killed himself have made this suddenly a crime. To railroad a college kid for Clementi’s act is more unfair than the original prank.